/************************************************************************
 * Cruise - a programming language of bad actors
 * Copyright 2006 Mark C. Chu-Carroll
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); 
 * you may not use this file except in compliance with the License. 
 * You may obtain a copy of the License at 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, 
 * software distributed under the License is distributed on an 
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, 
 * either express or implied. See the License for the specific 
 * language governing permissions and limitations under the License.
 * 
 */
package cruise.ast;

import java.util.Map;

/**
 * The AST representation of a by-name reference to an actor.
 * @author markcc
 *
 */
public class ActorIdentifier extends ValueExpression {
	
	public ActorIdentifier(String name) {
		this.name = name;
	}
	
	public String getName() {
		return name;
	}
	
	public String toString() {
		return name;
	}
	
	protected String name;

	@Override
	public ValueExpression instantiateVariables(Map<String, ValueExpression> map)
			throws UnmatchedVariableException {
		return new ActorIdentifier(name);
	}

	@Override
	public boolean match(ValueExpression te, Map<String, ValueExpression> map) {
		if (!(te instanceof ActorIdentifier)) {
			return false;
		}
		else {
			ActorIdentifier tea = (ActorIdentifier)te;
			if (tea.getName().equals(getName())) {
				return true;
			}
			else {
				return false;
			}
		}
	}

	@Override
	public boolean isConcrete() {
		return true;
	}

}
